September weather forecast and climate
Windsor, MO

September, the first month of the autumn, in Windsor, is still a warm month, with average temperature varying between 78.8°F (26°C) and 59.7°F (15.4°C).

Temperature

In September, the average high-temperature slightly decreases, from a moderately hot 84.7°F (29.3°C) in August, to a still warm 78.8°F (26°C). In September, in Windsor, the average low-temperature is 59.7°F (15.4°C).

Humidity

In September, the average relative humidity is 75%.

Rainfall

In Windsor, during 10.7 rainfall days, 1.81" (46mm) of precipitation is typically accumulated. In Windsor, during the entire year, the rain falls for 130 days and collects up to 21.81" (554mm) of precipitation.

Snowfall

In Windsor snow does not fall in June through October.

Daylight

The average length of the day in September is 12.4h.

Sunshine

In September, the average sunshine in Windsor is 9.2h.

UV index

In Windsor, the average daily maximum UV index is 5. A UV Index value of 3 to 5 symbolizes a moderate health risk from the exposure to the Sun's UV rays for the average person.
Note: The daily maximum UV index of 5 interpret into the following advice:
Take precautions - Protection against the skin and eye damage is obliged. The Sun's most intense and consequently most harmful UV radiation during midday hours should be decreased by minimizing exposure and seeking shade. A wide-brim hat offers excellent sun protection for eyes, ears, face, and neck. Sunglasses with UVA and UVB protection significantly reduce eye damage from sun exposure. Tightly woven, loose-fitting clothes provide additional protection from the Sun.

What is the temperature in September in Windsor?

In Windsor, in September, the average high-temperature is 78.8°F (26°C), and the average low-temperature is 59.7°F (15.4°C).

What is the average humidity in September in Windsor?

In September, the average relative humidity in Windsor is 75%.

How many days does it rain in September in Windsor?

In Windsor, Missouri, in September, it is raining for 10.7 days, with typically 1.81" (46mm) of accumulated precipitation.

When it does not snow in Windsor?

June through October are months without snowfall in Windsor, Missouri.

What is the average length of the day in September in Windsor?

In September, the average length of the day in Windsor, Missouri, is 12.4h.

How long on average sun shines in September in Windsor?

In September, the average sunshine in Windsor, Missouri, is 9.2h.

What is the UV index intensity in September in Windsor?

The average daily maximum UV index in September is 5. A UV Index estimate of 3 to 5 represents a medium health risk from the exposure to the Sun's UV radiation.
Average temperature in September - Windsor, MO
  • Average high temperature in September: 26°C

The warmest month (with the highest average high temperature) is July (30.3°C).
The month with the lowest average high temperature is January (3.4°C).

  • Average low temperature in September: 15.4°C

The month with the highest average low temperature is July (20.3°C).
The coldest month (with the lowest average low temperature) is January (-4.7°C).

Average pressure in September - Windsor, MO
  • Average pressure in September: 1016.6mbar

The month with the highest atmospheric pressure is January (1021.6mbar).
The month with the lowest atmospheric pressure is June (1012.9mbar).

Average wind speed in September - Windsor, MO
  • Average wind speed in September: 11.6km/h

The windiest month (with the highest average wind speed) is March (16.7km/h).
The calmest month (with the lowest average wind speed) is July (10.7km/h).

Average humidity in September - Windsor, MO
  • Average humidity in September: 75%

The month with the highest relative humidity is May (81%).
The month with the lowest relative humidity is October (72%).

Average rainfall in September - Windsor, MO
  • Average rainfall in September: 46mm

The wettest month (with the highest rainfall) is May (83mm).
The driest month (with the least rainfall) is January (22mm).

Average rainfall days in September - Windsor, MO
  • Average rainfall days in September: 10.7 days

The month with the highest number of rainy days is May (15 days).
The month with the least rainy days is January (5.5 days).

Average snowfall in September - Windsor, MO
  • Average snowfall in September: 0mm

The month with the highest snowfall is January (45mm).
Months with the least snowfall are June, July, August, September and October (0mm).

Average snowfall days in September - Windsor, MO
  • Average snowfall days in September: 0 days

The month with the highest number of snowfall days is February (6.1 days).
Months with the least snowfall days are June, July, August and September (0 days).

Average daylight in September / Average sunshine in September - Windsor, MO
  • Average daylight in September: 12.4h

The month with the longest days is June (Average daylight: 14.8h).
The month with the shortest days is December (Average daylight: 9.5h).

  • Average sunshine in September: 9.2h

Months with the most sunshine are June and July (Average sunshine: 10.2h).
The month with the least sunshine is January (Average sunshine: 4.9h).

Average sunshine days in September - Windsor, MO
  • Average sunshine days in September: 17.3 days

The month with the most sunshine days is December (20.6 days).
The month with the least sunshine days is May (12.9 days).

Average UV index in September - Windsor, MO
  • Average UV index in September: 5

Months with the highest UV index are June, July and August (UV index 6).
Months with the lowest UV index are January, February, November and December (UV index 2).

Average cloud cover in September - Windsor, MO
  • Average cloud cover in September: 30

The month with the most cloud cover is March (Cloud cover 49).
Months with the least cloud cover are June, July and August (Cloud cover 28).

Average visibility in September - Windsor, MO
  • Average visibility in September: 9km

Months with the highest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).
Months with the lowest visibility are January, February, March, April, May, June, July, August, September, October, November and December (9km).